JPH09116849A - Control system and control method for video reproduction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the video reproduction device by monitoring a state of the video reproduction device and providing an optional operation instruction depending on a state. SOLUTION: A controller 1 having a state signal identification means 11 and a remote control signal transmission means 12 controls a video reproduction device 2 having a remote control signal identification means 22 and a state signal transmission means 21. A state signal to discriminate the state of the video reproduction device 2 employs a signal representing a power supply state and a reproduction state of the video reproduction device 2 in a binary signal of 0, 1 level. Thus, the state of the video reproduction device 2 is monitored with the simple method and the control in response to the state is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system and control method for a video reproducing apparatus, and more particularly to control for monitoring the status of the video reproducing apparatus and giving an arbitrary operation command according to the status to the video reproducing apparatus. The present invention relates to a system and a control method.

[0002]

2. Description of the Related Art As a method of determining the state of a video reproducing apparatus for controlling the video reproducing apparatus, a synchronizing signal included in a video signal transmitted from the video reproducing apparatus is monitored to ensure that the video signal is normally transmitted. In general, there is a method of determining whether or not there is any, and a method of providing a bidirectional communication interface such as RS-232C in both the video playback device and the control device, and receiving a predetermined code indicating the state from the video playback device for determination. Target.

A conventional method for monitoring a synchronizing signal included in a video signal is disclosed in Japanese Patent Laid-Open No. 63-166381. Therefore, this method will be described with reference to FIG.

In this conventional example, the video signals output from the laser disk player P1 and the video tape player P2 are input to the normal video signal detection circuits 6a and 6b, respectively.

The normal video signal detection circuits 6a and 6b measure the number of horizontal sync signals per frame in the video signal or the level of the sync signal, and the measured values match those of the normal video signal. It is determined whether or not to do it.

When using RS-232C, RS
A video reproducing device having a 232C communication interface is already commercially available for business use, and a personal computer is used on the control device side.

As a method of giving an operation command from the control device to the video reproducing device, a predetermined code representing the operation command is transmitted using a wired or wireless remote control interface which is standardly provided in the video reproducing device. Method and
A general method is to provide a bidirectional communication interface such as RS-232C in both the video reproduction device and the control device, and transmit a predetermined code indicating an operation command.

[0008]

Conventionally, as a method of determining the state of a video reproducing apparatus for controlling the video reproducing apparatus, a synchronizing signal included in a video signal sent from the video reproducing apparatus is monitored and normally detected. When using the method for determining whether or not a video signal is transmitted, a video signal detection means having a video signal sync separation circuit as a main constituent circuit is provided in the middle of a video signal line connecting the video reproduction device and the video display device. It was necessary to provide. This method has a problem in that it is impossible to distinguish between a video signal to be displayed and a blue back or on-screen display that is automatically sent by the video playback device during video interruption.

In addition, R is provided to both the video reproducing device and the control device.
When using a method that includes a bidirectional communication interface such as S-232C and receives a predetermined code indicating a state from the video reproduction device and makes a determination, it is necessary to develop and implement complicated communication control software that matches the protocol. It was

An object of the present invention is to determine the power supply state and the reproduction state of the video reproducing apparatus by a simple method when the state of the video reproducing apparatus is monitored and an arbitrary operation command according to the state is given to the video reproducing apparatus. It is an object of the present invention to provide a control method of a video reproducing apparatus that enables the above.

[0011]

A control system for a video reproducing apparatus according to the present invention comprises a control device and a video reproducing device controlled by the control device, and the control device controls the video reproducing device from the video reproducing device. A remote control signal identification means for determining a status signal, and a remote control signal transmission means for controlling the video reproduction device, wherein the video reproduction device receives a remote control from the control device. Means and the power supply state and the reproduction state of the video reproducing apparatus are set to 0.
It is characterized in that it has a status signal sending means for notifying the control device with a status signal represented by two levels of level and one level.

According to the control method of the video reproducing apparatus of the present invention, in the case of controlling the video reproducing apparatus from the control apparatus, the control apparatus judges the status signal from the video reproducing apparatus,
A remote control signal for controlling the video reproduction device is transmitted, the video reproduction device identifies a remote control signal for receiving control of the remote control from the control device, and a status signal indicating a state of the video reproduction device is transmitted. Notify the control device,
The state signal indicating the power supply state and the reproduction state of the video reproduction device is represented by a binary value of 0 level and 1 level for the state determination of the video reproduction device.

According to the control method of the video reproducing apparatus of the present invention, the first step of checking whether or not the level of the status signal of the video reproducing apparatus is 1 level, and the duration of 0 level is a standard if the level is not 1 level in the 1st step. If it is within the reference time, if it is within the reference time, the second step of returning to the first step, and if it is 1 level in the first step, the third step of checking if the duration of one level is within the reference time And a fourth step of issuing a power-on remote control signal unless the duration of 1 level is within the reference time in the third step, and the duration of 0 level is not within the reference time in the determination of the second step. , Or when the duration of 1 level is within the reference time in the judgment of the third step, or after the completion of the fourth step, a remote control signal for reproduction is issued. Characterized in that in that it comprises a fifth step for.

[0014]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

Referring to FIG. 1, in the embodiment of the present invention, the control device 1 includes a status signal identifying means 11 and a remote control signal sending means 12, and the video reproducing device 2 includes a status signal sending means 21. And remote control signal identification means 22. The video reproduction device 2 is connected to the video display device 3 and sends out a video signal 4.

The state signal identifying means 11 and the state signal transmitting means 21, and the remote control signal transmitting means 12 and the remote control signal identifying means 22 are connected by connection cables, respectively.
This connection method may be a wireless connection method such as an infrared interface.

The status signal transmitting means 21 is used for the video reproducing device 2.
The power supply state and the reproduction state of (1) are replaced with a binary state signal B of 0 level and 1 level and sent to the control device 1. The generation method of the status signal B may be any of TTL, photo coupler, open collector, and the like.

The state signal identifying means 11 detects whether the input state signal B is 0 level or 1 level, determines the state of the video reproducing apparatus 2, and then determines the next operation of the video reproducing apparatus 2. The remote control signal transmission means 12 is notified.

The remote control signal sending means 12 replaces the operation content notified from the state signal identifying means 11 with a predetermined code and sends it to the video reproducing device 2 as a predetermined remote control signal A.

The remote control signal identification means 22 is a remote control interface that is standardly provided in the video reproduction device, and operates the video reproduction device 2 in accordance with the received remote control signal A.

FIG. 2 shows a remote control signal A issued by the control device 1, a status signal B sent from the video reproduction device 2, a power supply state C of the video reproduction device 2, and a reproduction state D of the video reproduction device 2.
3 is a time chart showing the relationship of

In the power-on / reproduction start processing, the power state C
Is off, the state signal B is at 1 level and the reproduction state D is stopped. First, when the control device 1 issues a power-on remote control signal A1 and the power state C is turned on, the state signal B changes to 0 level. Subsequently, the remote control signal A2 for reproduction is issued, and the reproduction state D becomes "reproducing".

In the repetitive reproduction processing, when the video reproducing apparatus 2 detects the end E of the source being reproduced by itself, the status signal B changes to 1 level for a specified time, then immediately returns to 0 level, and the reproduction status D changes. It will be stopped. This specified time is equal to or longer than the time that the status signal identifying means 11 can identify, and may be any second as long as it is within the reference time for determining that the power supply state of the video reproduction device 2 is off. Further, the end E of the source in the present embodiment is, for example, when the video reproducing apparatus 2 is a laser disc player, the time when the lead-out signal recorded in the source laser disc is detected. .

When the control device 1 detects the change of the state signal B to 1 level within the specified time, the control device 1 issues a reproduction remote control signal A2 ', and the reproduction state D becomes reproduction again. This step is repeated during the repeated reproduction time.

In the stop / power-off process, the control device 1 issues a stop remote control signal A3, and the reproduction state D becomes stop. Then, the power-off remote control signal A4 is issued, the state signal B changes to 1 level, and the power state C is turned off.

Next, referring to FIG. 3, the status signal identifying means 1
The procedure of state monitoring performed by the first method will be described.

First, in step S1, it is checked whether the level of the status signal B is 1 level. If it is not 1 level, the process proceeds to step S2, and if it is 1 level, the process proceeds to step S3.

In step S2, it is checked whether the duration of 0 level is within the reference time. If it is within the reference time, the process returns to step S1. If it is more than the reference time, the process proceeds to step S5. The reference time of step S2 is the longest time of the source, and if the 0 level continues for the reference time of step S2 or longer, it is determined that the video playback device 2 is stopped halfway due to some failure.

In step S3, it is checked whether the duration of one level is within the reference time. If it is not within the reference time, the process proceeds to step S4. If it is within the reference time, the process proceeds to step S5. The reference time of step S3 is a time for determining that the power supply state of the video reproduction device 2 is off. If the level continues for 1 level or more for the reference time of step S3, the power supply of the video reproduction device 2 is stopped due to some trouble. It is determined to be turned off.

In step S4, a power-on remote control signal A is issued. As a result, the power of the video reproducing apparatus 2 which has been turned off due to some trouble is turned on again.

At step S5, the remote control signal A for reproduction is sent.
Issue As a result, the reproduction is started again.

By this state monitoring procedure, the video reproducing device 2
It is possible to monitor the minimum necessary state when controlling automatic repeat playback.

In the present embodiment, when the video reproducing apparatus 2 detects the end E of the source being reproduced by itself, the status signal is changed to 1 level within the specified time. As long as it is a trigger for the next operation, it may be at a constant time or at a timing other than the end of the source such as chapter break if the source is a laser disk.

[0035]

As described above, according to the present invention,
When the state of the video reproducing device is monitored and an arbitrary operation command according to the state is given to the video reproducing device, it is possible to determine the power supply state and the reproducing state of the video reproducing device by a simple method. Further, it is possible to realize almost the same function at a lower cost than the method of mounting a sync separation circuit or a bidirectional communication interface such as RS-232C.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a time chart showing changes in state signals and device states in the embodiment of FIG.

3 is a flowchart showing a state monitoring procedure in the embodiment of FIG.

FIG. 4 is a configuration diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 control device 11 state signal identification means 12 remote control signal transmission means 2 video reproduction device 21 state signal transmission means 22 remote control signal identification means 3 video display device 4 video signal A remote control signal issued from control device B transmitted from video reproduction device Status signal C Power status of video playback device D Play status of video playback device A1 Remote control signal for power on A2 Remote control signal for playback A2 'Remote control signal for playback A3 Remote control signal for stop A4 Remote control signal for power off E End of source

Front page continuation (72) Inventor Hiroshi Yamaguchi 5-7-1, Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Ko Kusakabe 1-28-3, Mita, Minato-ku, Tokyo NEC Information Service Within the corporation

Claims (4)

[Claims] 1. A control device and a video reproduction device controlled by the control device, wherein the control device discriminates a status signal from the video reproduction device, and the video signal. A remote control signal sending means for controlling the playback device, wherein the video playback device identifies the remote control signal identification means for receiving control of the remote control from the control device, and the power supply state and playback state of the video playback device. A control system for a video reproducing apparatus, comprising: a status signal transmitting means for notifying the control apparatus with a status signal represented by a binary value of 0 level and 1 level. 2. When controlling the video reproducing device from the control device, the control device determines a status signal from the video reproducing device and sends a remote control signal for controlling the video reproducing device, The video reproduction device identifies a remote control signal for receiving a remote control from the control device, notifies the control device of a status signal indicating the status of the video reproduction device, and determines the status of the video reproduction device by the A method of controlling a video reproducing device, characterized by using a status signal that represents a power supply state and a reproduction state of the video reproducing device by binary values of 0 level and 1 level. 3. A first step of checking whether the level of the status signal of the video reproducing apparatus is 1 level, and if it is not 1 level in the 1st step, it is checked whether the duration of 0 level is within the reference time, and the reference time. If it is within the range, the second step of returning to the first step; if the level of the first step is 1 level, the third step of checking whether the duration of the 1 level is within the reference time, and the 1 level of the 3rd step. Is not within the reference time, the fourth step of issuing a power-on remote control signal, and the determination of the second step when the 0 level duration is not within the reference time, or the determination of the third step. 1
And a fifth step of issuing a remote control signal for reproduction when the duration of the level is within a reference time or after the completion of the fourth step. 4. The reference time of the second step is the longest time of the source, and when 0 level continues for the reference time or more, it is determined that the video reproduction device is stopped in the middle due to some trouble. If the reference time of the third step is the time to determine that the power supply state of the video reproduction device is off, and if the duration of one level is within the reference time, it is determined to be normal reproduction end, 4. The control method of the video reproducing apparatus according to claim 3, wherein when one level continues for the reference time or more, it is determined that the power of the video reproducing apparatus is turned off midway due to some trouble.